Let's see the LakeBTC's graceful charts, during this period when drop $2 per rise $1

How do you keep the profit? If cant, how do you stop loss? please share your strategy with me, thanks!
http://i.imgur.com/ZkMo9ZC.pngi'm new to this field i don't no about this anything so try to give me few suggestions about this. few members said to me buy bit coin for low price and sell in to high price. then you get more profit from that. most of the people buying and selling bit coins so in this process they earning more profits so once try to buy and sell it.